Answer:
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Answer:
The probability of selecting randomly 6 packets such that the first 4 contain cocaine and 2 not is 0.3522.
Step-by-step explanation:
Probabilities of selecting 4 packets with the ilegal substance:
= 
Combinassions possible= 1365
Probabilities of selecting 2 packets with white powder:
= 
Combinations possible= 10
Probabilities of selecting 6 packets from the totality of them:
= 
Combinations possible= 38760
The probability of picking 4 with the substance and 2 with only white powder is:
= 0.3522
I hope this answer helps you.
369
Step-by-step explanation:
Arc length=(π*diameter)*(angle/360°)
88π=π*diameter*80°/360°
diameter=369
3* 3.14
= 9.42
9.42 * 2
= 18.84
* (4+3)
= 131.88 cm.
Glad to help! :D